On Tue, 3 Aug 2004, Thomas Lumley wrote: > On Tue, 3 Aug 2004, Jack Tanner wrote: > > > > write.table(NULL) > > Error in which(unlist(lapply(x, function(x) is.character(x) || > > is.factor(x)))) : argument to "which" is not logical > > > > Is this correct behavior? It seems harsh to abort an entire run just > > because one of the tables you generated happened to be NULL. > > > > Well, yes, in a perfect world write.table(NULL) would just write no > output. It's arguably even a bug, or at least the fact that the same > thing happens with a zero-length data frame is arguably a bug. I'll fix > it.
It's zero-column cases it gets in trouble with: zero-row cases are handled correctly AFAICS. Depends what `zero-length' means. We should change it, although what is the right output is less clear to me. You can have zero-columns and non-zero rows and with row names. Compare > hills[FALSE] NULL data frame with 35 rows with > as.matrix(hills[FALSE]) (a column of rownames). -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
